(art, photography) Dark; characterised by dark tones and muted colours. / (by extension) Restrained, subtle, not trying to attract attention.

(Canada, US, colloquial) Kind of. / (slang) In a low-key or surreptitious manner; secretively; on the down-low.

Relaxed, unstressful, not pressured.

Alternative form of hotkey

(computing) Any of a set of keys on a personal computer or terminal keyboard used to activate a predefined or programmable function.

The key on a typewriter used to select uppercase letters and certain special characters by physically moving the mechanism

(computing) A key on a personal computer or terminal keyboard used in combination to modify the function of other keys; normally labelled "Ctrl"

(computing) A key on a personal computer or terminal keyboard used in combination to alter the function of other keys

Abbreviation of programmed (or programmable) function key.

plural of Allen key